What will be the value of \( n_{2} \) for the given figure: (A) \( \frac{\sqrt{3}}{2} \) (B) \( ...

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What will be the value of \( n_{2} \) for the given figure:
(A) \( \frac{\sqrt{3}}{2} \)
(B) \( \frac{1}{\sqrt{2}} \)
(C) \( \frac{1}{2} \)
(D) undefined
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